I assume (ASS-U-Me??) that you meant 168gn Sierra BTHP bullets.
If you can't acquire Varget (which I use) then there are plenty of other powders available that you can use. eg. Viht N 140, Viht 540, Tr140, IMR/H4895,H BL-C2, H335,IMR4064, etc. etc. etc. Virtually every Reloading powder supplier has one suitable for 168gn .308s.
ps. when you find a powder that suits, buy lots of it. (I've still got 4/5 cans of Varget)